#include <stdio.h>
#include <string.h>

int main()
{
	printf("hello c!\n");

	char arr[] = { 'a','b','c' };
	char arr1[] = { 'a','b','c','\0' };

	printf("%d\n", strlen(arr));
	printf("%d\n", strlen(arr1));


	return 0;
}